Apparatus for heating dispensed flowable material

ABSTRACT

Apparatus for heating flowable material dispensed from a pressurized container includes a housing to receive the pressurized container and a heat exchanger assembly having a passageway through which the material to be heated flows. Enclosed inside the heat exchanger is an electric heating element and a thermal switch assembly for controlling the heating element. The switch assembly has first and second electric current conducting contact blades resiliently biased in the same direction and supported by insulators at one end in spaced relationship. The switch assembly has a pivotal cam element that cooperatively acts on both blades and there is a stop member movable to prevent the cam element against pivoting in one direction and is released from its stop position by a temperature responsive element set at a predetermined temperature. Operation of the switch is initiated by a two-position actuator.

Waite States Patent 91 R'yckman, Jr.

[451 May15,1973

[54] APPARATUS FOR HEATING DISPENSED FLOWABLE MATERIAL [75] Inventor:William D. Rycknian, Jr., Asheboro,

[73 Assigneez clii aific'iiic Company, Bridgeport, Conn.

[22] Filed: Sept. 15, 1971 [21] Appl. No.: 180,582

[52] US. Cl. ..219/308, 219/214, 219/301, 219/305, 219/328, 222/146 HA,337/344,

[51] Int. Cl. ..H05b l/02, B67d 5/62 [58] Field of Search....,..219/214, 296-309,

219/331, 327, 328; 337/356-359, 366, 344; 222/146 R, 146 HA, 146 HEIIIIIIIII Primary Examine rA. Bar ti s W Attorney- Lawrence R. Kemptonet a1.

[57] ABSTRACT Apparatus for heating flowable material dispensed from apressurized container includes a housing to receive the pressurizedcontainer and a heat exchanger assembly having a passageway throughwhich the material to be heated flows. Enclosed inside the heatexchanger is an electric heating element and a thermal switch assemblyfor controlling the heating element. The switch assembly has first andsecond electric current conducting contact blades resiliently biased inthe same direction and supported by insulators at one end in spacedrelationship. The switch assembly has a pivotal cam element thatcooperatively acts on both blades and there is a stop member movable toprevent the cam element against pivoting in one direction and isreleased from its stop position by a temperature responsive element setat a predetermined temperature. Operation of the switch is initiated bya two-position actuator.

10 Claims, 9 Drawing Figures APPARATUS FOR HEATING DISPENSED FLOWABLEMATERIAL BACKGROUND OF THE INVENTION 1. Field of the Invention Thisinvention relates to a switch, and particularly a switch for apparatusused to electrically heat flowable material dispensed from pressurizedcontainers, such as shave cream.

2. Description of the Prior Art Apparatus for heating shave cream,including shave cream dispensed from pressurized containers, have beenknown for some time. Conventional pressurized containers use apropellant gas to discharge foam products from the containers.Generally; the propellant gas is dispersed throughout the product underpressure and in liquefied form. Upon release of the discharge outlet ofthe container, the propellant forces the product out of the containerand, simultaneously, expands to form gas bubbles and generate the foam.

Expansion of the propellant from a liquid to a gas, however, has acooling effect on the foam product. This cooling effect is particularlyundesirable in shave cream because cold shave cream foams are not onlyuncomfortable, but also are slow in softening the beard for the shavingoperation. Human hair is more easily shaved when softened by thepenetration of moisture from the shave cream, and this softening effectincreases with increasing shave cream temperature. For this reason,numerous heating apparatus or devices have been proposed for heatingfoam shave cream as it is discharged from the containers to increase theease and effectiveness of shaving.

Some of the previously proposed devices for heating foam shave creamemploy an electrical resistance element or wire to supply the necessaryheat. Many of those devices utilize a switch operable by the user forenergizing and de-energizing the heating element. In the case of heatedshave cream dispensers that heat foam from a pressurized container, itis important that the container not be subjected to elevatedtemperatures which could causethe container to burst. Many of the priorart dispensers do not automatically turn 011'. While they do have atemperature responsive element that de-energizes the heating element,such an arrangement permits the dispenser to continuously recycle andsuch recycling can result in a build up of temperature transferable tothe pressurized container. In addition, many of the prior art dispensershave the heating element energized by the user depressing a button.Excessive temperature rise could also occur if the actuation of thebutton was repeated in rapid succession or if an object was placed onthe button to keep it depressed for a long period of time. By thisinvention a switch is provided that eliminates these difficulties andminimizes the chance of excessive temperature build-up.

SUMMARY OF THE INVENTION In accordance with this invention, there isprovided a switch assembly having first and second electric currentconducting contact blades. Both blades are resiliently biased in thesame direction and are supported at one end by electric insulatingmaterial in spaced relationship and carry contact buttons at the otherend. There is a pivotal cam element that cooperatively acts on bothblades and a stop member movable to prevent the cam element againstpivoting in one direction. The

stop member may be released by a temperature responsive element set at apredetermined temperature. Operation of the switch is initiated by atwo-position actuator having means, such as a magnet, in the firstposition to move the first blade in a direction opposite its biaseddirection and pivot the cam element to force the second blade to move inthe same direction as the first blade but out of electrical contact withthe first blade. Simultaneously, the lock member is positioned to stopthe cam element against pivoting in one direction. Upon release of theactuator the second position is assumed and the moving force, such asthe magnet, is released to allow the first blade to move in its biaseddirection and contact the second blade. When the predetermined settemperature of the temperature responsive element is reached it releasesthe stop member to allow the cam element to pivot and the contact bladesseparate to break electrical contact.

It is an object of this invention to provide an improved electricalswitch assembly.

It is an object of this invention to provide a switch assembly forapparatus utilizing electric heating means for heating materialdispensed from a pressurized contamer.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of anelectrically heated shave cream dispenser.

FIG. 2 is a partial cross-sectional view of the heated shave creamdispenser showing the pressurized container and the heat exchanger.

FIG. 3 is a cross-sectional view of the heat exchanger with my switchassembly.

FIG. 4 is a partially cut-away perspective view of the heat exchangerwithout my switch assembly. a

FIG. 5 is a perspective view of my switch assembly.

FIG. 6 is a side elevational view of my switch assembly in its normallyoff position.

FIG. 7 is a side elevational view of my switch assembly in its firstposition of actuation.

FIG. 8 is a side elevational view of my switch assembly in its secondposition of actuation.

FIG. 9 is a circuit diagram showing schematically the electric circuitof the heated shave cream dispenser.

DESCRIPTION OF THE PREFERRED EMBODIMENT Referring now to the drawings indetail, FIG. 1 illustrates an electrically heated shave cream dispenserhaving a plastic molded housing 10, the base 12 of which is readilydetachable from the rest of the housing so that it may be removed forreplacement of the pressurized container. The front panel 14 of thehousing 10 has molded in it an outlet spout 16 with an opening 18 fordischarge of the heated shave cream from the housing. The top 20 of thehousing 10 has a recessed area 22 with a surrounding wall 24 and has acentral opening 25. Disposed in the opening 25 is a rocker arm 26 foroperating the dispenser. An electric cord 28 and plug 30 are alsoprovided for supplying electrical current to the dispenser when the plug30 is inserted into a wall receptacle.

FIG. 2 shows the internal arrangement of the heated shave creamdispenser by removing front panel 14. On the left-hand side of FIG. 2there is shown a pressurized container 32 containing shave cream withthe dispensing outlet thereof inserted into an axially movable valveactuator 34 retained by a circular internal upstanding wall 36 having adiameter slightly larger than the valve actuator 34. The pressurizedcontainer 32 is held in place within the housing by a circular dependingwall 38 that engages the inside of a rolled flange 40 of container 32.Wall 38 is slightly resilient so that the container may be readilyaccepted and easily removed therefrom by the user. Valve actuator 34 hasan internal passageway leading from the outlet of the pressurizedcontainer 32 to a plastic transfer tube 42 that leads to the right-handside of the dispenser and is connected to a tubular projection 46 of theheat exchanger assembly 44. Heat exchanger 44 is maintained in itsproper location within housing 10 by securing it against an internalsupport partition 48 integrally molded with the plastic housing 10.Positioned above the heat exchanger and the pressurized container is anelongated rocker arm 26. The rocker arm is pivoted about a pin 50transverse to the rocker arm and has both ends retained in the sidewalls of the opening 25 in the top panel 20. Leaf spring 55 secured tothe bottom of the top panel by screws 56 acts to retain the rocker armin its normally horizontal position. The portion of the rocker arm 26overlying pressurized container 32 has a downwardly directed projectionor finger 58 that makes contact with the top 59 of the valve actuator 34when that side of the rocker arm is pushed and causes the valve actuator34 to move downwardly in the direction of the pressurized containerthereby releasing the contents within the container. The contents flowunder pressure up through a passageway in the interior of valve actuator34 and into the transfer tube 42.

The right-hand side of the rocker arm 26 overlying the heat exchanger 44functions to actuate the electric heating means within the heatexchanger when depressed downwardly, as will be more fully describedlater. The plastic housing 10 may be formed in any convenient mannerfrom suitable plasticmaterials, such as by molding, and in thisparticular case, the housing is made in three parts, an upper portion60, a middle portion 62, and the base 12. Upper portion 60 is secured tothe middle portion by screws 64 while the base portion 12 is attached tothe middle portion 62 by an interfitting lip 66 and held in place by aperipheral bead 68 formed in the middle portion 62 cooperating with acomplimentary groove formed in the base portion 12. This permitsretention of the base portion 12 to the middle portion 62 but it may beeasily removable by graspingwith the hand and removing it with someslight force to gain access to the interior of the dispenser to replacethe pressurized container.

With reference to FIGS. 3 and 4, the description of the heat exchangerassembly that houses my switch assembly will now be discussed. The heatexchanger is cylindrical in shape and is double walled in that there isan outer shell 70 and an inner shell 72 slightly smaller than the outershell so that it may fit within the outer shell. The inner shell 72 iscup-shaped in that it is open at one end and closed at the other. Theclosed end comprises the top wall 74 of the heat exchanger assembly. Theouter shell 70 is a cylindrical tube, the top of which has a peripheralinwardly turned flange 76. The side wall of the outer shell 70 has aspiral continuous groove or channel 78 through which shave cream fromthe pressurized container will flow. To this end, the outer shell 70 isprovided with an inlet tube 46 for introducing the shave cream into theheat exchanger and an outlet tube 82 for discharge of the heated shavecream. Within the heat exchanger double-walled construction andpositioned adjacent the inner surface of inner shell 72 is a sheet ofinsulating material 84. Inwardly adjacent the insulating material 84 isan electric heating element board 86 which is provided with sawtoothnotches 88 and which has wound around it an electrical resistance wire90. The wire is retained in its proper spaced relationship from onewinding to the other by each turn being positioned in the bottom of thenotches 88. inwardly adjacent heater board 86 is a second sheet 92 ofinsulating material similar to sheet I 84 and then finally there is aC-shaped spring 94 having the ends thereof inwardly turned to formportions 96. Spring 94 maintains structural layers 92, 86 and 84 againsteach other and urged against the inner wall of inner shell 72. By thisarrangement the heating element is retained in good heat transferrelationship with spiral channel 78 through which the shave creampasses. It will be understood that the outer shell and the inner shell72 are made from good heat conductive material, such as aluminum. Theassembly of the heat exchanger elements as described above is thenretained by a plastic molded closure or cap 98 having an outsidediameter larger than outer shell 70. Cap 98 has an upwardly directedcircumferential flange 100 within which is seated the outer and innershells. The junction between the shells 70 and 72 and the cap 98 issealed with a suitable waterproofing compound during assembly. Screws130 through the top wall 74 are also surrounded by waterproofingmaterial. Cap 98 has an open hollow boss 102 through which the line cord28 may be inserted for making connections 105 on terminal board 107 tosupply electrical current to the heating element within the heatexchanger. Again, after assembly this opening is sealed with awaterproof compound 103. Cap 98 and the shells are additionally heldtogether by two Spring clips 104, each on opposite sides of the heatexchanger from the other.

Located within the interior of the heat exchanger assembly is my switchassembly 106 for controlling energization of the heating element wire90. The switch assembly 106, as shown in FIGS. 3, 5-8, includes asupport bracket 108 upon which are mounted the various electricalcontacts and lead connectors separated by insulator washers 110. Theswitch assembly includes two contact blades 112 and 114 each of whichcarry, respectively, contact buttons 116 and 118. Both blades areresiliently biased in the same direction, downwardly as shown in thedrawings. At the free outer end of contact blade 112 is mounted amagnetically attractable element 120 separated from the blade by aninsulator plate 122.

Positioned to cooperatively act on both contact blades 112 and 114 iscam element 124 that rotates about an axle or pin 134, one end of whichis secured, as by welding, to the support bracket 108. The cam elementhas a lower groove 136 that receives contact blade 114 and an uppergroove 138 that receives contact blade 112. Pin 134 about which the camelement pivots, is between the contact blades. Located near the bottomof the switch assembly is stop member 140 that is resiliently biasedupwardly in the direction of cam element 124. One end of the stop memberis fixed and the opposite free end has an upturned end portion 142 andalso carries an adjustment screw 144. Between stop member 140 andcontact blade 114 and electrically insulated from blades 112 and 114 isthermally responsive bimetallic blade 126. When the bimetallic blade issubjected to heat, the difference in coefficient of expansion of the twolaminated metals from which blade 126 is made causes the blade to bend.When the temperature is elevated the bimetallic blade 126 bendsgradually and with the metal having the lower coefficient of expansionon the side toward the stop member 140, the bimetallic blade 126 bendssufficiently to contact an adjustment screw 144 and exert enough forcethereagainst to move the stop member 140 downwardly opposite its biaseddirection.

Interposed between contact blade 114 and terminal lead 146 is anover-temperature solder fuse connection 148. The connection is madebetween two oppositely spring-biased arms joined at one end by solderchosen to melt at a predetermined temperature and allow the arms tospring apart thereby breaking any electric circuit through the switchassembly. One spring arm 150 is formed as part of contact blade 114 andthe other spring arm 152 is formed as part of the stop member 140.

A small magnetic buzzer 154 is carried by projection 156 formed as partof support bracket 108. The buzzer is electrically wired in series withthe rest of the dispenser circuit and serves to give the user an audibleindication that the heating cycle is in progress.

The entire switch assembly is held together by bolts 130 that passthrough the center of insulator washers 110, contact blades 112 and 114,bimetallic blade 126 and one end of support bracket 108. Also secured byscrews 130 to top wall 74 of inner shell 72 but outside the heatexchanger is the spring member 128. Spring member 128 is resilientlybiased upwardly away from the switch assembly and has at its free end apermanent magnet 132. It should be noted that between the magnet 132 andthe magnetically attractable element 120 carried by contact blade 112 isthe aluminum top panel 74 of the inner shell 72. This panel preventsactual touching of the magnet 132 and the magnetically attractableelement 120. i

For a detailed discussion of the operation of the heated shave creamdispenser and the operation of my switch assembly described above tocontrol the dispenser, reference may be had primarily to FIGS. 2, 3, 5-8of the drawings. With the power plug 30 inserted into a proper outletfor providing electric current, and it is desired to heat the shavinglather, the right-hand portion of the rocker arm 26 located above theheat exchanger is depressed to contact spring member 128. As thedownward movement of the rocker arm progresses the spring bias of member128 is overcome resulting in the magnet 132 being moved down against thetop wall 74 of the inner shell 72. This position is shown in FIG. 7 ofthe drawings. At this time the magnet 132 attracts the magneticallyattractable element 120 within the interior of the heat exchangerassembly. The magnetic attraction overcomes the spring bias of contactblade 112 causing that blade to move upwardly whereupon it bears againstan upper cam projection 160 and causes the cam element to pivot orrotate clockwise, as viewed in FIG. 7. In doing so the lower camprojection 162 bears against contact blade 114 to force that blade toalso move in the same direction as contact blade 112, against itsresiliently biased direction, but out of electrical contact with contactblade 112. Contact buttons 116 and 118 are still not closed.Simultaneously, the

stop member 140 is permitted due to its biased condition to springupwardly behind rear cam surface 164 of the cam element 124. The stopmember being now positioned to prevent counterclockwise rotation of thecam element as rear cam surface 164 abuts upwardly turned end portion142 to prevent such cam element movement. The second position ofactuation is when the rocker arm 26 is released. At this time the springbias of member 128 being greater than the magnetic attraction betweenthe magnet 132 and magnetically attractable element 120, the magnetsprings upwardly to remove its influence on the element and contactblade 112 thereby allowing contact blade 112 to move downwardly in thedirection it is biased. Since stop member prevents rotation of the camelement 124, contact blade 114 is maintained stationary by a groove 136in the cam element and contact buttons 116 and 118 make contact. Thissecond actuation position is shown in FIG. 8 of the drawings. Theelectrical circuit of the dispenser is now complete and with referenceto FIG. 9, the electrical circuit is completed from slug 30 through lead166, buzzer 154, heating wire 90, contact blade 112 carrying button 116,to contact blade 1 14 via button 118, arm of blade 114, fuse connection148, stop member arm 140, to power lead back to plug 30. The electricalconnection between Contact blades 112 and 114 is maintained until thebimetal blade 126 bends responsive to a predetermined temperaturesufficiently to bear against adjustment screw 144 to force the stopmember 140 downwardly to disengage it from the cam element thus allowingthe cam element to pivot about its axle and the contact blades 112 and114 to separate breaking the electrical circuit. This position is asshown in FIG. 6 of the drawings. At this time the dispenser is ready toheat the shave cream by passing it through the heated heat exchanger. Tothis end the left-hand portion, as viewed in FIG. 2, of the rocker arm26 above the pressurized container 32 is depressed so that finger 58pushes the valve actuator 34 downwardly permitting the contents of thepressurized container to be ejected therefrom under pressure and passthrough the valve actuator 34 into the transfer tube 42 and into theheat exchanger-via the inlet tube 46. The force of the shave cream beingejected from the pressurized container causes the cream to be forcedspirally around the heat exchanger-within channel 78 between the innershell 72 and the outer shell-70. As the shave cream is traveling in thismanner from the inlet to the outlet the heated heat exchanger transfersheat to the shave cream so that upon its being expelled out throughopening 118 in the housing the shave cream has been heated. It will beappreciated that as long as the left-hand portion of the rocker arm ispressed down shave cream will continue to be expelled through the systemand out the opening 118.

The foregoing is a description of the preferred embodiment of theinvention and variations may be made to the apparatus without departingfrom 'the spirit of the invention, as claimed in the appended claims.

I claim:

1. Apparatus for heating flowable material dispensed therefromcomprising:

a. a housing adapted to receive a pressurized container,

b. a heat exchanger assembly having an inlet and outlet including:

1. passageway means for conducting discharged contents of thepressurized container from the inlet to the outlet,

2. electric heating means in heat transfer relationship with saidpassageway,

c. control means for said electric heating means including; l. a switchassembly comprising;

aa. first and second current conducting contact blades, both bladesbeing biased in the same direction and supported at one end in a fixedspaced relationship by insulating material,

bb. a pivotal cam element cooperating with both of said blades,

cc. a stop member movable to stop the cam element against pivoting inone direction,

dd. means to move the stop member to allow the cam element to pivot insaid one direction, and

2. a two-position actuator, said actuator in the first position havingmeans to move the first blade in a direction opposite its biaseddirection and thereby pivot the cam element to force the second blade tomove in the same direction as the first blade but out of electricalcontact therewith, and also thereby permitting the stop member to stopthe cam against pivoting in said one direction, and said actuator in thesecond position having means to release the moving force on the firstblade and allow it to move into contact with the second blade, and

d. means from the outlet of saidpressurized container to the inlet ofthe heat exchanger for conducting the dispense'd material.

2. The apparatus of claim 1 wherein the heat exchanger is double-walledand the passageway is between the double walls.

3. The apparatus of claim 2 wherein the inner wall of the heat exchangeris a cup having one open end sealed with a closure and the cup ishermetically sealed.

4. The apparatus of claim 1 wherein an electrically operated soundproducing device is included to indicate that the apparatus is in aheating mode.

5. The apparatus of claim 1 wherein the housing has an outlet fordischarge of contents therefrom and said apparatus has means forconducting the dispensed material from the heat exchanger to the housingoutlet.

6. The apparatus of claim 1 wherein the means, to move the stop memberto allow the cam element to pivot in said one direction is responsive toa predetermined temperature.

7. The apparatus of claim 6 wherein the temperature responsive means isa bimetallic blade.

8. Apparatus for heating shave cream dispensed from a pressurizedcontainer comprising:

a. a housing adapted to receive the pressurized container and having anoutlet for discharge of shave cream therefrom,

b. a hollow heat exchanger assembly having an inlet and outletincluding;

l. passageway means for conducting the shave cream of the pressurizedcontainer from the inlet to the outlet,

2. electric heating means in heat transfer relationship with saidpassageway,

c. control means for said electric heating means including;

l. a switch assembly comprising;

aa. first and second current conducting contact blades, both bladesbeing biased in the same direction and supported at one end in a fixedspaced relationship by insulating material,

bb. A pivotal cam element cooperating with said blades,

cc. a stop member movable to stop the cam element against pivoting inone direction,

dd. a temperature responsive element that moves the stop member to allowthe cam element to pivot in said one direction at a predeterminedtemperature to open the first and second contact blades,

. a two-position actuator, said actuator in the first position havingmeans to move the first blade in a direction opposite its biaseddirection and thereby pivot the cam element to force the second blade tomove in the same direction as the first blade but out of electricalcontact therewith, and also thereby permitting the stop member to stopthe cam against pivoting in said one direction, and said actuator in thesecond position having means to release the moving force on the firstblade and allow it to move into contact with the-second blade,

d. means from the outlet of said pressurized container to the inlet ofthe heat exchanger for conducting the shave cream, and

e. means for conducting the'shave cream from the heat exchanger outletto the housing outlet.

9. The apparatus of claim 8 wherein the switch assembly is locatedwithin the heat exchanger assembly.

10. The apparatus of claim'8 wherein the heat exchanger is double-walledwith the passageway between the double walls and the inner wall is a cuphaving one open end sealed with a waterproof closure.

1. Apparatus for heating flowable material dispensed therefromcomprising: a. a housing adapted to receive a pressurized container, b.a heat exchanger assembly having an inlet and outlet including: 1.passageway means for conducting discharged contents of the pressurizedcontainer from the inlet to the outlet,
 2. electric heating means inheat transfer relationship with said passageway, c. control means forsaid electric heating means including;
 1. a switch assembly comprising;aa. first and second current conducting contact blades, both bladesbeing biased in the same direction and supported at one end in a fixedspaced relationship by insulating material, bb. a pivotal cam elementcooperating with both of said blades, cc. a stop member movable to stopthe cam element against pivoting in one direction, dd. means to move thestop member to allow the cam element to pivot in said one direction, and2. a two-position actuator, said actuator in the first position havingmeans to move the first blade in a direction opposite its biaseddirection and thereby pivot the cam element to force the second blade tomove in the same direction as the first blade but out of electricalcontact therewith, and also thereby permitting the stop member to stopthe cam against pivoting in said one direction, and said actuator in thesecond position having means to release the moving force on the firstblade and allow it to move into contact with the second blade, and d.means from the outlet of said pressurized container to the inlet of theheat exchanger for conducting the dispensed material.
 2. electricheating means in heat transfer relationship with said passageway, c.control means for said electric heating means including;
 2. atwo-position actuator, said actuator in the first position having meansto move the first blade in a direction opposite its biased direction andthereby pivot the cam element to force the second blade to move in thesame direction as the first blade but out of electrical contacttherewith, and also thereby permitting the stop member to stop the camagainst pivoting in said one direction, and said actuator in the secondposition having means to release the moving force on the first blade andallow it to move into contact with the second blade, and d. means fromthe outlet of said pressurized container to the inlet of the heatexchanger for conducting the dispensed material.
 2. The apparatus ofclaim 1 wherein the heat exchanger is double-walled and the passagewayis between the double walls.
 2. electric heating means in heat transferrelationship with said passageway, c. control means for said electricheating means including;
 2. a two-position actuator, said actuator inthe first position having means to move the first blade in a directionopposite its biased direction and thereby pivot the cam element to forcethe second blade to move in the same direction as the first blade butout of electrical contact therewith, and also thereby permitting thestop member to stop the cam against pivoting in said one direction, andsaid actuator in the second position having means to release the movingforce on the first blade and allow it to move into contact with thesecond blade, d. means from the outlet of said pressurized container tothe inlet of the heat exchanger for conducting the shave cream, and e.means for conducting the shave cream from the heat exchanger outlet tothe housing outlet.
 3. The apparatus of claim 2 wherein the inner wallof the heat exchanger is a cup having one open end sealed with a closureand the cup is hermetically sealed.
 4. The apparatus of claim 1 whereinan electrically operated sound producing device is included to indicatethat the apparatus is in a heating mode.
 5. The apparatus of claim 1wherein the housing has an outlet for discharge of contents therefromand said apparatus has means for conducting the dispensed material fromthe heat exchanger to the housing outlet.
 6. The apparatus of claim 1wherein the means to move the stop member to allow the cam element topivot in said one direction is responsive to a predeterminedtemperature.
 7. The apparatus of claim 6 wherein the temperatureresponsive means is a bimetallic blade.
 8. Apparatus for heating shavecream dispensed from a pressurized container comprising: a. a housingadapted to receive the pressurized container and having an outlet fordischarge of shave cream therefrom, b. a hollow heat exchanger assemblyhaving an inlet and outlet including;
 9. The apparatus of claim 8wherein the switch assembly is located within the heat exchangerassembly.
 10. The apparatus of claim 8 wherein the heat exchanger isdouble-walled with the passageway between the double walls and the innerwall is a cup having one open end sealed with a waterproof closure.